Why not do it as an "X" for more stability. Depending on length, you could drill 5 sets of holes on it easily. Pivot on center with a thumbscrew and they would be easy to store as well. Should be fairly easy to do from any scrap wood

Past my son holding a goose on the other side of the pond are divebombs. Not sure how good the picture quality is but this was around 10am with full sun at our backs. We killed a 5 man limit of geese that morning and every group finished perfect. Just make sure to angle em towards the ground when facing the sun and you should be good to go.